Ellipsograph.



PATENTED DEC. 10, 1907.

N. D. H. BECK. BLLIPSOGRAPH.

I APPLICATION FILED MAY 22, 1907.

NIELS DANIEL SOFUS KRlS'IlANSEN BECK, OF CHICAGO, ILLINOIS.

ELLIBSOGRAPH.

Specification of Letters Patent.

Patented Dec. 10, 1907.

Application filed May 22.1907. Serial No. 375.039.

To all wig-om it may concerns Kuis'imnsniv Biceiga citizen of the United I is a side elevation thereof, the parts being ad- Be, it known that l, NIELS DANIEL Sores States, residing at (.hicago, in the county of tain new and useful improvements in an Ellipsograph, of which the following is a speci- 'hcation.

This invention relates to. drafting instruments and more particularly to elli'psograph.

' of that type in which ellipses of different sizes may be quickly and accuratelydrawn the pencil or .pcn being so mounted as to be normally raised oil the surfaceen Wllk'liilifielli )se is to be made.

' he objects of my invention are to provide .an cllipsograph, of great accuracy, which shall be simple to adjust and easy to'operate, and which shall be comparatively inexpen sive to manufacture; to provide an instru-' ment as mentioned, which shall be light and readily positioned with relation tethe sur face upon-which the ellipse is to be drawn, and which may be readily and firmly held in position without injury to the paper or other surface upon which it rests; ant to provide a device as mentioned in which the scribing instrument is normally held in retracted )osition,'and equip the same with means for owering the instrument at will into engagement with the surface to be marked.

Further objects will appear hereinafter.

With these objects in view my invention 18' embodied in an ellipsograph comprising a cruciform frame having slots substantially coextensive with the arms thereof and arranged at ri ht angles to each other, in rombination wit span of slides mounted 111' respective slots, blocks ivotally secured to reparts, all as will be hereinafter described, and

particularly pointed out in the claims, My invention will be more readily understood by reference to the accompanying and in which, i I

Figure 1 is a lan view of an ellipsograph embodying one orni of my invention, Fig. 2

drawings forming a part of this specification (look and State of Illinois, have invented eer- .sideof they block 8 there bein justed to draw an ellipse of small minor dlam-' cter, the front arm of theframe being shown in section, and the rear leg omitted for clearn'ess, Fig. 3 is a plan view, on an enlarged scale, of the "raduated, instrlun'ent carrying arm and the blocks adjust-able thereon, Figs. 4 and 5 aredetail views respectively of the two slides and the arts connected thereto.

Referring to the rawing 'l-designates the cruciform frame of the a )paratus, the arms of which are provided with longitudinal slots 2 that meet at a common mint and at the outer endsof the arms arel egs 3 jointed 8t.

their lower ends and provided wit 1 washers or disks 4 to form tacklike extremities whereby the legs can be pricked into the surface oii which the ellipse is to be drawn and enable the parts 4 to suitably support the frame and when the frame is so adjusted it is fixed against accidental displacement.

Movably mounted on the frame are slides designated generally by 5 and 6 that are free to move in the slots 2. The slide 5 is com: posed of two blocks 7 and 8, the latter being provided with horizontal grooves 9 on oppositesides as shown clearly in Fig. 4 for presenting flanges 10 that engage over the top and bottom surfaces of the frame for holding the slide in the slots 2; On the block 7 is a vertically extending stud 11 that projects through the opening 12 in the block 8 as clearly shown in Fig. 4 and the blocks are removably secured together'by means of the pin 13 extending'throughthe stud on the top disposed under-tbcpin. By t iis means the 'blocks 7 and 8 are pivotally connected and are adapted for relative rotary movement on a washer 14- which is pivotally connected with the-block 16 by means of a stud 17 on the latter, which projects through the block 15 thereby permitting of a relative rotary movement also on a vertical 18 indicates a bar slidably niounted in the blocks, 7 and. 16, and carrying an instrument holder, l9'at the end adjacent to the block, ,16. The size andproportions of the ellipse to be drawn by the device is regulated by the distance of the instrument from the blocks, 16,.and 7:that is, the minor axis oft the ellipse is measured by twice the distance from the axis of rotation of the block, 16 to the scribing instrument, 20; and'the major "the screw, 23, holds the block,

mg the screw,

'j'of the slide 6, there being I stud that .engage the top and .bottom sides portions to be made.

is measured by twice the distance between the instrument and the axis of the block, 7. It follows, therefore, that suitable means must be provided for adjusting these distances and for securely-holding the parts in their relative positions after adjustment. The manner of'doing this is clearly illustrated. in Fi 30f the drawings, wherein the bar, .18, is il ustrated as having a crosshead, "1, upon the end opposite from the one carrying theinstrument, 20. Swiveled in the head, 21, is a screw, 22, threaded through the blocks, 7 and preferably having a bearing in the block, 16. Assuming that the block, 16 is fixerhit is evident that by turning the screw, 22 the distance between the blocks may be nicely adjusted, especially as the bar, 18 .is provided with a graduated scale r this purpose. Swiveled in the opposite de of the head, 21, is a screw, 23, which and is passes freely through the block, 7 threaded through the block, 16. If preferred, this screw may have a bearing in the instrument, 19.

it is evident that by turn- 23 the distance between the holder 19 and the block, 16 may be nicely adjusted, the scale on the bar, 18, facilitating the adjustment. In operation the block, 16 is first set, fixing the minor diameter or axis of the ellipse, then the block, 7 is adjusted to iix the major axis. In setting the block, 7, 16 against movement.

As before stated the block, 16 has vertical as well as rotary movement in relation to the slide, 15. This is in order that the instru ment, 20 may be lowered or raised at will.

To .this end the apparatus is provided with a handle 25 whereby the scriber can be conveniently moved to scribe the ellipses and this handle is hingedly connected at 26 on the stud 11 of the slide 5, the stud ex tending upwardly above the block Sfor this purpose. On the opposite end of the lever or handle 25 is a grip 27 and extendinglongitudinally-of the handle is a slot 28 into which extends the upper end of the'stud 17 pins 28 on the of the handle or lever 25. freely ed tobe depressed by the handle to bring the point of the scriber 20 into marking relation to the surface on which the ellipse is to be drawn. Normally the scriber is held off of the surface by a helical compression spring 29 mounted on the stud 17 interposed between the underside of the handle 25 and top of the block 15. i Q

In practice the frame is set up in the desired position and the screws 23 and 22 manipulated to adjust the relative position of the slides 5 and 6 and the instrument 20 to enable an ellipse of the desired size and pro The grip 27 of the.

The stud 17 is movable in the block 15 and is adapt eraser handle 25 is then grasped and ressed downwardly so as to bring the scri er 20 in contact with the surface to be marked and then j by a rotary movement of the lever the scriber will draw an ellipse, the slides being free to move in the slots 2 in an obvious manner.

The apparatus can be made of any desired size according to the nature of the work 'to be done and a pen, pencil, brush or other device may be used for doing the marking. Also when it is desired to cut out an ellipse for any purpose, a knife can be secured in the holder 19, While the device is extremely simple in operation and adjustment, it is also durable, pensive construction.

From the foregoing description taken in connection with the accompanying drawing the advantages of the construction and the method of operation will be readily apparentto those skilled in the art to which the invention appertains and while 1 have described the principle of operation of the invention together with the device which 1 now consider to be the best embodiment thereof I desire to have it understood that the device shown is merely illustrative and that such changes may be made when desired as are within the scope of the claims.

Having thus described my invention what I claim as new is:

supporting the same, slides mounted onthe frame, a bar adjustably fixed to said slide, an instrument holder rigidly fixed on one end of said bar, and me ans for depressing the holder and moving the same while depressed for .drawing an ellipse.

2. An ellipsograph comprising a cruciform frame having slotted arms, legs supporting the frame, slides movable in the slots of the arms, adjustable connection at the underside of the frame for connecting the slides, an in-. strument holder and instrument arranged thereon a handle mounted on one of the slides and" disposed above the frame, and means connecting the handle with the other slide for depressing said holder and instrument, substantially as described. 1 3. In a device of the class described, a l cruciform slotted'frame, in combination with ja'pair of slides mounted in respective slots, I blocks pivotally secured to res ective slides,. j abar slidably mounted in said blocks and ment'holder and means for lowering said holder and causing the same to revolve, subj stantially as described.

havin" a scale marked thereon, an instruin relation to each other and to. said instru- 4. In a device of the class described, a

substantial and of 1116X-- 1.. An e'llips'ograph comprising a frame, legs 7 blocks pivotally arranged-beneath said slides,

a bar slidably connec ting said blocks, an in l strument holder and instrument arranged at the end of said bar, a handle pivot-ally arblock arranged beneath said slide and forming i a handle pivoted to the stud on the other said block and adapted to depress the first said ranged'ab'ove one of said slides and adapted to lower the block on the other said slide to bring the instrument into contact with the surface to be markedand also to cause the same to revolve, substantially as described.

5. In a-device of the class described, a cruciform slotted frame, in combination with a pair of slides mounted in respective slots, a

each said slide and having a stud extending vertically through I pivots for said blocks, 'a bar slidably mounted. in said blocks, an instrument holder and instrument fixed to one end of said bar adjacent to one of said blocks,

l block to cause the same to lower the instrul ment into contact with the paper and also I adapted to cause the same to revolve, sub- 1 stantially as described.

6. In a device of the class described: a cruciform slot ted frame, in combination with l a pair of slides mounted in respective slots, a block arrangekjll beneath each said slide and having a stud extending vertically through said slide and forming pivots for said" block, one of said blocks having vertical as well as rotary movement in relation to its respective slide, a bar slidably mounted in said blocks,

I ed to depress said block an instrument holder andinstruinent fixed to the end of said bar adjacent to said vertically inovab'le'block, a handle pivoted to the stud of the vertically fixed block and connected Lwith the stud of the vertically movable block,

and means for normally holding said handle and the parts connected thereto in raised position, substantially as described. p

7. In a device of'the class described, a cruclform slotted frame, in comb1nat1on;w1th

' a pair of slides mounted in respective slots, at

block arranged beneath each said slide and having a" stud extending vertically through i said slide and forming'pivots for said blocks, 1 a bar slidably mounted in said block's, an intrument holder and instrument fixed to the end of said bar adjacent to one of said'blocks, 5 means for adjusting the relative positions of 5 said blocks with each other and with said instrument, a handle pivoted above one of said slides and connected to'the pivotal member of the block on the other said slide and adaptto ment into contact with tl tially as described. a

In testimony whereof I have signed my name to this specification in the presence of the two subscribing. witnesses.

NIELS ILNI BII SOFI'S KlllS'lH-NSHN BECK. \Yitnessesz.

FRANCES I. SHEEHY, HELEN F. LiLLrs.

e paper, substanbring the instru- 

